Last update 17 June 2022
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East Anglia codes first appeared in weekly notices from circa 22 November 1997. The entire system was revamped less than a year later with revised codes effective from 26 September 1998. Most codes mapped cleanly to their newer alternative but some did not. The original system appears on this page.
| Code | Line Name | Route Availability (RA) |
|---|
| EA1000 | All Lines | |
| EA1010 | Liverpool Street to Seven Kings | 8 |
| EA1011 | Seven Kings to Ipswich | 8 |
| EA1012 | Ipswich to Trowse Junction | 8 |
| EA1013 | Trowse Junction to Norwich Replaced by new EA1013 from 19 April 2014 | 8 |
| EA1013 | Trowse Swing Bridge to Wensum Junction via Through Sidings/Wensum Curve Replaced old EA1013 from 19 April 2014 | 8 |
| EA1020 | Carpenters Road South Junction to Carpenters Road North Junction | 8 |
| EA1030 | Forest Gate Junction to Woodgrange Park Junction | 8 |
| EA1040 | Romford to Upminster | 8 |
| EA1050 | Shenfield Junction to Southend Victoria | 7 |
| EA1060 | Wickford Junction to Southminster | 7 |
| EA1070 | Witham to Braintree | 6 |
| EA1080 | Marks Tey Junction to Sudbury | 6 |
| EA1090 | Colchester Junction to Clacton | 7 |
| EA1100 | East Gate Junction and Hythe Junction to Colchester Town | 7 |
| EA1110 | Thorpe-le-Soken to Walton-on-Naze | 7 |
| EA1120 | Manningtree (North and South Junctions) to Harwich Town | 8 |
| EA1130 | Griffin Wharf Branch | 8 |
| EA1140 | Ipswich Docks Branch | 1 |
| EA1150 | Channelsea South Junction to Stratford Central Junction West | 8 |
| EA1160 | Bethnal Green East Junction to Bishops Stortford | 8✖Bethnal Green Junction - Hackney Downs Junction RA4 from 16 April 2011 |
| EA1161 | Bishops Stortford to Ely North Junction | 8 |
| EA1162 | Ely North Junction to Kings Lynn | 8 |
| EA1170 | Hackney Downs North Junction to Enfield Town | 8 |
| EA1180 | Reading Lane Junction to Navarino Road Junction (Graham Road Curve) | 8 |
| EA1190 | Bury Street Junction to Cheshunt Junction | 8 |
| EA1200 | Clapton Junction to Chingford | 7 |
| EA1210 | Broxbourne Junction to Hertford East | 9 |
| EA1220 | Stansted (South and North Junctions) to Stansted Airport | 8 |
| EA1230 | Royston to Shepreth Branch Junction | 9 |
| EA1240 | Chesterton Junction to Fen Drayton | 6 |
| EA1250 | South Lynn to Kings Lynn Harbour | 6 |
| EA1260 | Kings Lynn Harbour Branch | 6 |
| EA1270 | Kings Lynn Junction to Middleton Towers | 8 |
| EA1280 | Stratford Central Junction East to Coppermill Junction | 8 |
| EA1290 | Tottenham South Junction to South Tottenham East Junction | 8 |
| EA1300 | South Tottenham West Junction to Seven Sisters Junction | 8 |
| EA1310 | Camden Road West Junction to Richmond | 8✖Gunnersbury - Richmond RA4 (from 19 July 2008; previously RA6) |
| EA1320 | Camden Road West Junction to North Woolwich Replaced by new EA1320 from 14 May 2007 | 8 |
| EA1320 | Camden Road West Junction to Stratford Low Level Replaced old EA1320 from 14 May 2007; replaced by new EA1320 from 2 January 2009 | 8 |
| EA1320 | Camden Road West Junction to Stratford Platforms 1 and 2 Replaced old EA1320 from 2 January 2009 | 8 |
| EA1325 | Dalston Junction to New Cross/New Cross Gate Replaced by new EA1325 from 1 January 2011 | 8 |
| EA1325 | Highbury And Islington to New Cross/New Cross Gate Replaced old EA1325 from 1 January 2011; replaced by new EA1325 and SO511 from 25 June 2022 | 8 |
| EA1325 | Highbury And Islington to Dalston West Curve Replaced old EA1325 from 25 June 2022 | 8 |
| EA1327 | Silwood Junction to Old Kent Road Junction From 23 June 2012; replaced by SO681 from 25 June 2022 | 8 |
| EA1330 | South Acton Junction to Old Kew Junction & New Kew Junction | 8 |
| EA1340 | Stratford Lea Junction to High Meads Junction | 8 |
| EA1350 | Channelsea North Junction to Temple Mills East Junction | 8 |
| EA1360 | Dudding Hill Junction to Acton Wells Junction | 8 |
| EA1370 | Gospel Oak to Barking Tilbury Line Junction West | 8 |
| EA1380 | Fenchurch Street to Shoeburyness | 8✖Fenchurch St - Gas Factory Junction (to 16 April 2011)/Barking (from 16 April 2011) RA3 |
| EA1390 | Barking Tilbury Line Junction East to Pitsea (via Tilbury) | 8 |
| EA1395 | Barking Riverside Branch Seen by September 2021 | 8? |
| EA1400 | Gas Factory Junction to Bow Junction | 3✖Certain locos of higher RA are permitted |
| EA1410 | Upminster to West Thurrock Junction | 8 |
| EA1420 | Thames Haven Junction to Thames Haven | 8 |
| EA1430 | East Suffolk Junction to Oulton Broad North Junction | 7✖East Suffolk Junction - Westerfield Junction RA8 |
| EA1440 | Westerfield Junction to Felixstowe Town | 7 |
| EA1450 | Trimley to Port of Felixstowe North Quay Terminal | 7 |
| EA1460 | Felixstowe Beach Junction to Felixstowe Beach | 7 |
| EA1470 | Norwich Thorpe Junction to Lowestoft | 7✖Wensum Curve RA6 |
| EA1474 | See EA1744 | |
| EA1480 | Whitlingham Junction to Cromer | 6 |
| EA1490 | Cromer to Sheringham | 6 |
| EA1500 | Brundall Junction to Yarmouth (via Acle) | 7 |
| EA1510 | Reedham Junction to Yarmouth | 7 |
| EA1520 | Saxmundham Junction to Sizewell | 7 |
| EA1530 | Coldham Lane Junction to Haughley Junction | 8 |
| EA1540 | Chippenham Junction to Ely Dock Junction | 8 |
| EA1550 | Ely North Junction to Ely West Junction (Ely West Curve) | 8 |
| EA1560 | Ely North Junction to Peterborough | 8 |
| EA1570 | March (East and West Junctions) to Wisbech | 8✖Whitemoor - Wisbech RA6 |
| EA1580 | Ely North Junction to Trowse Junction | 8 |
| EA1744 | Europa Junction to Boss Hall Junction/Bacon Factory Chord As defined; EA1474 looks a more likely original intention but is not used | 10 |
| EA5380 | North Pole Junction to Acton Wells Junction Code given in 1998 and 2003 notices | 8 |
| EA5390 | Acton Canal Wharf to Willesden Code given in 1998 and 2003 notices | 8 |
| EA5440 | Acton Wells Junction to Acton East Code given in 1998 and 2003 notices | 8 |
| EA8990 | Norwich Crown Point depot | 8 |
| EA9980 | Code given in 1998 and 2003 notices without definition | |
| EA9990 | Other lines Code given in 1998 and 2003 notices |